Unix: Check if a file exists with certain prefix

[Gracious]

I have a shell script which is failing. I am on Unix right now. I need your help in this matter. My code is all about looking for files on a directory which is having a specific prefix. Usually all of the files have the prefix of "s" such as sMusic, sDocument, etc. My code is as follows:

if [file exists with prefix s*] then
perform operation1
else
perform operation2
fi

and my script is as follows:

if [-e s*]; then
operation1
else
operation2
fi

But the problem is that although you will find a lot of folders/files containing prefix of "s", the above code still fails and directly goes to the ELSE part. Need your help urgently!

[Zecho]

There are certain points that I would like to say you. First of all there should be a space in between "if [-e s*]" statement like this "if [ -e s* ]". Another thing that I would like to say here is that you should be careful when dealing with scripts. You explicitly use cd(1) to the directory for the directory on which you are using it. One more thing, if there is no file that is having "s" prefix then you may have the script that results you badly.

[Gracious]

Ok so I changed my code as you said. I thought of using "-f" switch. But the problem is that the exact filename is only returned with this. My new code looks like this
if [ -f "${filePath}/s*" ]; then
etc etc...

[kelfro]

That is because of the way scripts usually performs for pathname expansion. You have to let the expansion to occur at the right time.

shopt -s nullglob
i=(s*)
if [ -n "$i" ]; then
echo Condition passed
else
echo Condition failed
fi

[Zecho]

The result completely depends on how you code it. You can code it like to expand it and iterate it as you want.

#!/bin/sh
cd /var/tmp || exit 255
for x in s*; do
echo "The file is $x"
done

This is obviously different from what you want to find the availability of the file, but instead it simply checks the presence of the file. So code it like this:

#!/bin/sh
cd /var/tmp || exit 255
for x in s*; do
echo operation1
exit 0
done